12477717678 has 16 divisors (see below), whose sum is σ = 24976907136. Its totient is φ = 4155660600.

The previous prime is 12477717671. The next prime is 12477717737. The reversal of 12477717678 is 87671777421.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12477717671) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 887098 + ... + 901053.

It is an arithmetic number, because the mean of its divisors is an integer number (1561056696).

Almost surely, 2^12477717678 is an apocalyptic number.

12477717678 is an abundant number, since it is smaller than the sum of its proper divisors (12499189458).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12477717678 is a wasteful number, since it uses less digits than its factorization.

12477717678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1789319.

The product of its digits is 6453888, while the sum is 57.

The spelling of 12477717678 in words is "twelve billion, four hundred seventy-seven million, seven hundred seventeen thousand, six hundred seventy-eight".